Location of Repository

A numerical validation of a high-order finite-difference compact scheme for computational aeroacoustics.

By Aldo Rona, Ivan Spisso, L. Moret-Gabarro, A. Guaus, C. Airiau and P. Cathalifaud

Abstract

This is the author's final draft of the paper published as 46th AIAA Aerospace Sciences Meeting and Exhibit, Reno, Nevada, January 7-10, 2008. This material appears here with the permission of the American Institute of Aeronautics and Astronautics, Inc. The final version is available from http://www.aiaa.org/content.cfm?pageid=406Computing sound directly from unsteady flows featuring large-scale instabilities requires numerical methods that can resolve the small amplitude perturbations of sound embedded in the large-amplitude hydrodynamic flow unsteadiness. The perturbations due to sound need to be propagated with an acceptable\ud dispersion and dissipation over significant distances to adequately resolve in space the noise near field. In this paper, a high-order compact scheme is detailed that promise to deliver the small dispersion and dissipation characteristics to directly model the noise and the unsteadiness in low Mach number flows. The performance of the scheme is assessed by cross-comparison against selected benchmark problems from the\ud first workshop on benchmark problems in Computational Aeroacoustics (CAA) and additional test cases, including the reflection of an acoustic pulse into a corner, which is a challenging application due to the confluence of two wall conditions at the corner. Analytical solutions for the test cases are also produced to validate the predictions. The numerical results show that the scheme achieves comparable performances in computing these relatively simple two-dimensional test problems, with levels of dispersion and dissipation comparable to that in the published literature from similar computational aeroacoustic schemes. The results give confidence in developing these scheme to tackle more complex, three-dimensional noise producing flows, of interest for practical engineering applications

Publisher: American Institute of Aeronautics and Astronautics (AIAA)
Year: 2008
OAI identifier: oai:lra.le.ac.uk:2381/4114

Suggested articles

Preview

Citations

  1. (2006). A noise-controlled free shear flow,”
  2. (1998). A robust high-resolution split-type compact FD scheme for spatial direct numerical simulation of boundarylayer transition,”
  3. (2001). Bruit rayonne par un ecoulement affleurant une cavite: simulation aeroacoustique directe et application de methodes integrals,
  4. (1992). Compact finite difference schemes with spectral-like resolution,” doi
  5. (1993). Dispersion-Relation-Preserving finite difference schemes for doi
  6. (2006). Etude nume´rique de sensibilite´ et controˆle optimal du bruit ae´roacoustique ge´ne´re´ par une couche de me´lange compressible bidimensionelle,
  7. (2007). Feedback control on cavity flows using reduced-order models,” doi
  8. (1990). Nonreflecting boundary conditions for Euler equation calculations,” doi
  9. (1996). Radiation and outflow boundary conditions for direct computation of acoustic and flow disturbances in a nonuniform mean flow,” doi

To submit an update or takedown request for this paper, please submit an Update/Correction/Removal Request.